leaflet-craft/src/helpers/Stack.js

Zoopla inspired freehand polygon creation using Leaflet.js.

export default function Stack() {
    let stack = [];
    return {
        pop() {
            return stack.pop();
        },
        push(data) {
            stack.push(data);
        },
        clear() {
            stack = [];
        },
        length() {
            return stack.length;
        },
        filter(fn) {
            stack = stack.filter(fn);
        },
        empty() {
            if (stack.length !== 0) {
                return false;
            }
            return true;
        },
        top() {
            if (stack.length !== 0) {
                return stack[stack.length - 1];
            }
            return 0;
        },
        show() {
            if (stack.length === 0) {
                return 'I am empty!';
            }
            console.log(stack);
        }
    };
}